64711744011421 has 16 divisors (see below), whose sum is σ = 73417720219200. Its totient is φ = 56543527277568.

The previous prime is 64711744011389. The next prime is 64711744011527. The reversal of 64711744011421 is 12411044711746.

It is not a de Polignac number, because 64711744011421 - 2⁵ = 64711744011389 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64711744611421) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 107337391 + ... + 107938588.

It is an arithmetic number, because the mean of its divisors is an integer number (4588607513700).

Almost surely, 2^{64711744011421} is an apocalyptic number.

It is an amenable number.

64711744011421 is a deficient number, since it is larger than the sum of its proper divisors (8705976207779).

64711744011421 is a wasteful number, since it uses less digits than its factorization.

64711744011421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 215277228.

The product of its (nonzero) digits is 150528, while the sum is 43.

The spelling of 64711744011421 in words is "sixty-four trillion, seven hundred eleven billion, seven hundred forty-four million, eleven thousand, four hundred twenty-one".